Experts at the CSE Cybsec Z-Lab have found a Gafgyt variant implementing the VanillaUPX technique recently presented in a cybersecurity conference
A new variant of the Gafgyt botnet is spreading in the last hours and experts of the CSE Cybsec Z-Lab have found it with the support of the Italian cyber security experts @Odisseus and GranetMan.
The new variant analyzed in the report published by the experts was found on a system resolving the IP address owned by the Italian ISP Aruba. This specific version implements some advanced packing techniques that make the static analysis much harder.
We downloaded the sample directly from the compromised server, we found four samples of the Gafgyt variant that were already compiled for the specific architecture, X86-64, X86-32, MIPS, ARM.
The sample shows the same behavior associated with the classic Gafgyt botnet but we immediately noticed a distinctive feature, the implementation of “VanillaUPX” technique shown in the “Unpacking the non-unpackable” presentation
Malware Must Die leader @unixfreaxjp presented the sophisticated technique at the recent Radare conference (r2con2018) in his talk about the “VanillaUPX” technique.
According to the experts the “VanillaUPX” ELF was around since a few months before the talk and our discovery confirms that malware developers started adopting it.
The report includes a detailed analysis of the malware.
You can download the full ZLAB Malware Analysis Report at the following URL:
Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines.
Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.